also getting this unknown error after updating to the latest update. can't do anything. keeps saying failed to download content and to check the internet connection but I can play another online game...

If the problem really is "old" devices then it is ridiculous as hell since some devices are only 3 years old. I know many people that easily go 4 years with a device. I myself play on a 3 year old device that looks like it can go another 3 year.
Kabam needs to fix this because people aren't going to buy a new device just for the game, thus losing players...

Hi... @Kabam Miike User name in game is IDX1274. I am unable to play! I have been with the game for a few years! I am 194,536 with 184 heroes. This upgrade has me unable to fight at ALL!! I use a HP Slate 7 HD running Android 4.2.2. It cannot be upgraded any further says its up to date. I cant hit support as it says I'm a danger to security and to update my version to even log a support ticket!! I have used this tablet since I started, it is only used to play the game that's all. After last update my screen size was changed and NEVER fixed at all even though I reported it here!! This update has the game with errors and crash on every single fight no matter where it happens, AQ, AW, Q... I will not buy a new tablet to play!!! I am not happy at all with Kabam!! I just got 3 class catalyst science and just upgraded my Quake to 5/50 trail!!! So Mad!! cant play my game, cant play AW or AQ at all.... WTF??